Drop hammer



July 19, 1927.

' INVENTOR M BY W. MERRILL DROP HAMMER Fil d Oct. l6, 1926 ATTQRNEYS Patented July 19, 1927. 7'

UNITED STATES PATENT. OFFICE.

WHITINiEY MERRILL, OF BROOKLYN, NEW YORK, ASSIGrNOR TO MERRILL BROTHERS, OF MASPETH, LONG ISLAND, NEW YORK, ACORPORATION OF NEW YORK.

DROP HAMMER.

Application filed October 16, 1926. Serial No. 142,010.

My invention is directed to the drop hamthe ram is lifted to a predetermined height. mer lifting roll operating mechanism and The curved under surface of the arm 7 of comprises a lifting roll operating lever arthe roll releasing lever is arranged to be enranged to be engaged by the reciprocating gaged by the horizontal upper surface of the ram in its upward movement with a conram 1 with a constant vertical direction of stant vertical direction of force to raise the force to eliminate side thrust between the lifting roll operating rod and thereby release ram and the lifting roll releasing lever which the roll; whereby side thrust, which so freso frequently causes breakage inthose hamv quently causes breakage of the parts, is elimimers where the lifting lever is engaged by nated. V a pin on the ram wit-ha constantly chang- My invention more particularly comprises ing direction offorceduring the engagement a lifting roll operating lever having an arm of the ram with the lever. The curved provided with a curved under surface arunder surface of the arm 7 of the roll re- 65 ranged to have a lateral shifting engageleasing lever also has a lateral shifting enment with a horizontal upper surface of the gagement with the horizontal upper surface ram to not only provide for the constant of the ram, whereby the movement of the vertical direction of force but also to inlifting roll operating rodis increased rela crease the relative movement of the lifting tive to the movement of the ram. 70 roll operating rod to the ram, as the ram What I claim is slows down. 1. In a drop hammer, a vertically recip- A practical embodiment of my invention rocating ram having a horizontal upper suris represented in the accompanying drawface and a roll r-cleasing lever having a ings. in which curved under surface for rocking engage- 7 Fig. 1 represents, in front elevation, that ment with said horizontal upper surface of part of a drop hammer which includes my the ram with a constant vertical direction of invention. force, to'eliminate side thrust.

Fig. 2 represents a horizontal section 2. In a drop hammer, a vertical recipro t-ak-en in the plane of the line II-II.of Fig. eating ram having a horizontal. upper sur- 80 1, looking in the direction of the arrows. 1 face and a roll releasinglever having an arm The vertically reciprocating ram is deprovided with a curved under surface for noted by 1 and one of the side uprights by 2. rocking engagement with said horizontal up The usual lifting roll operating rod is deper surface of the ram with a constant vernoted by 3 and the stationary supporting tical direction of force, to eliminate side 85 rod 4. An adjustable bracket 5 is clamped thrust. I to the lifting roll operating rod 3 in any 8. In a drop hammer, a vertically recipdesired position and an adjustable bracket 6 rocating ram having a horizontal upper suris clamped to the stationary supporting rod face, a fixed support, a lifting roll operatin any desired position. I ing rod and a roll releasing lever carried by 00 The lifting roll releasing lever comprises said support and engaging said rod, said 40 an arm 7 clamped to a member 8, pivotally lever having a curved under surface for mounted on a stud 9 projecting from the rocking engagement with the horizontal upbracket 5, which member 8 is provided with per surface of the ram with a constant vera rigid arm 10, the free. end of which is tical direction of force, to eliminate side05 connected by a swinging link 11 to the sta-- thrust, and to increase the relative movetionary supporting rodbracket 6. mentof the roll operating rod to the ram This arm 7 of the lifting roll releasing as the engagement shifts laterally toward lever is preferably somewhat resilient so as the axis of the lever.

to reduce the force ofthe blow as it is en- I In testimony. that I claim the foregoing 0' ga-ged by the upwardly moving ram and it as my invention, I have signed my name 50 has a curved under surface 12 arranged in this 14th day of October, 1926.

position to be engaged by a horizontally dis- V posed upper surface 13 of the ram when WHITNEY MERRILL. 

